GPT-6 Sol leaks, screenshots and release rumors

A leak says GPT-6 Sol arrives this month, possibly at the September 29 DevDay, with Polymarket giving 90% odds that it sits slightly below Astra but is faster and cheaper.

The post says Astra is already impressive, guesses Sol may be next, and jokes that Anthropic's Fable 5.1 might be fighting for its life.

The poster speculates OpenAI staff have used GPT-6 Astra since mid-July, finishing something planned for early 2027 six months early, and believes it is a new Codex or an autonomous research framework.

A leaker says most details have already surfaced ahead of the September 29 event, which is expected to reveal an AI auto researcher plus GPT-6 Sol, Terra and Luna.

The post asks whether OpenAI will build a more granular thinking-effort ladder for Sol and Astra, or keep Plus users permanently capped at Sol.

A leaker says GPT-6 is a model family with Astra as the flagship and Sol, Terra and Luna still to come, and wonders how Sol and Luna will compare to Astra's low reasoning tier on price-performance.

GPT-6 is not a single model: Astra is a new tier above Luna, Terra and Sol, and cheaper, higher-quota models like Sol will shape most users' experience.

A user shares a high-quality video said to be made with only Unreal Engine and GPT-6 Astra, and says GPT-6 Sol could arrive this week if all goes well.

A rumor says OpenAI's DevDay on September 29 will release GPT-6 Luna, Terra and Sol plus GPT-Image 2.5, with Astra productivity gains pulling some plans forward by six months.

A user speculates OpenAI may unveil GPT-6 Sol, Terra and Luna at DevDay, giving Plus users near-Astra intelligence at lower cost in regular chat mode.

A Japanese user laments that 5.6-sol may become 6-sol, guesses Astra will be reserved for the Pro tier, and expects Plus users' chats to fall back to GPT-6 Sol, hoping it keeps the feel of 5.5 and 5.6.

Citing a claim that part of a plan was moved up six months to launch at DevDay, the post argues Sol, Terra and Luna could arrive as soon as this month and guesses at a new service or a new Codex.